Improvement in bxjng-cutter



JOIIN I. MUNROE, OF WOBURN, MASSACHUSETTS.

Lttcrs Patent No. 101,903, dated A11-ril 12, 1870.

IMPROVEMENT IN BUNG-CUTTER.

The Schedule' referred to in these Letters Patent and making part cf the same.

To all whom it may concern Be it known that I, J oHN- I. MUNROE, of Woburn, in the county of Middlesex and State of Massachusetts, have invented a new and useful Bling-Cutting Machine; and I do hereby declare that the following,`

taken in connection with the drawings which accomQ pany and form part of this specification, is-a description of my invention sutlicient to enable those skilled in the art to which it appertains to practice it.

This invention relates to a machine forcutting bungs of any desired size, either straight or tapering, and

The invention consists in a device for holding the stock from which the bungs are cut, andin thearrangement vot' parts by which the machine can be adjusted and employed to cut bungs of different sizes, and also in the device by which the cutters are brought in contact with the stock, for the purpose of cutting the same.

Figure 1 -is a top or plan view of the machine;

Figure-2 is a vertical longitudinal section of the same; and l Figure 3. is alongitudinal vertical section of the cutter-head.

Similar letters of reference indicate like parts in the several gures.

In the drawings- A represents a table, supported by legs B B.

C is a bed-plate, having two uprights, D D, formed upon it.

E is a shaft, havng' its bearings in 'and revolving freely in uprights D. Motion is imparted to-this shaft. by means of a belt acting upon pulleyF, keyed `.upon the shaft, as shown.

The collars a a, secured by set-screws, as shown, L

serve to prevent end-play of the shaft.

b is a head secured upon the end of shaft E bya setscrew, as shown in fig. 1.- This head has two arms, in which are formed longitudinal slots, as shown.

c c are T-shaped bolts, through the heads of which pass the cutters ff, while the bolt or tail is formed square, to t the slots in arm b,the"portion extending through the slot being round, and threaded, as shown' at e, iig. 3, to receive the screw-nuts d.

e c are screw-bolts, secured in the end of arm h,and which, by reason of their enlarged heads bearing against the ends of the arms, anda piu inserted in the bolts at the outer endsof the slots revolve in the arm without end play. "lhesescrew-bolts pass through corresponding threaded holes in the square bolt' portion of T pieces c c, and consequently, by rotating bolts c e, the pieces c c are moved toward or from shaft E, as desired.

j is a thin circular flange, formed upon the hub I, which slides freely upon shaft E, a spline, p, inserted in the shaft and passing through a corresponding slot in hub l, insuring the rotation of' the hub with the shaft. v

In flange j is formed two radial slots, k, in which slide freely the small blocksi i, which latter, by real son of shoulders bearing against the front side of the flange and pins upon the back side, are prevented from havingend play.

lhe short rods h h are either secured in or formed as part of the heads i. Both the cutters f f and rods h h pass through the couplings g g, and are held by set-screws, as is plainly'shown in figs. 1 and 2.

m is a lever, which passes astride hub l, as shown in fig. 2, the ends ofthe forks being pivoted upon the vertical rod a', which rises from the foot n.

In a concentric groove formed in hub l, as shown in fig. 2, are fitted two short studs, o o, which are pivoted in the arm of lever m,.as shown, so that, by giving to thislever a horizontal movement, the hub l has imparted to it a sliding movement upon shaftiE.

In the front end of shaft E is inserted a short stud, q, which is held in place by a' concentric groove and pin, as shown, or in any other suitable manner, to allow the shaft to rotate 'while the stud is stationary. This stud is slightly smaller than shaft E, in order that it may revolve freely in head b, and in its face are inserted short spurs, as shown, which enterrthe wood G when `being cut, and serve to hold it in position.

tis a plate, which slides freely upon bed-plate C, being held thereto by a dovetail slide, or other suitable device.

s is an upright formed upon plate t. In this upright is secured the stud r, provided with spurs, as shown.

`I is an angle lever, which is pivoted in the bracket u, secured to table A. The vertical end of this lever moves freely in slot H, and its point is inserted in a hole in theunderside of plate t.

At the end ofthe horizontal arm of this lever is attached the strrup c, the lower endof which is attached to treadle u', which is pivoted iu the depending stud J. The spring y, bearing under the end of lever I, as shown, serves to hold "-it..in the position shown in iig. 2, when the treadle is released. The practical use of this machine is briefly stated as follows The operator places the strip of board, from which bungs are to be ct, between the studs q and r,when, by actuating treadle fur, sliding piece s t is moved forward until the spurs enter the wood, as shown in fig. 2, when, by drawing toward himself by his right hand, the lever m, the hub-l will be forced toward the head b, tb ereby, through the agency of flange j, acting against the shoulders ou heads i, forcing the cutters in contact with board G, and as these cutters, through the agency before explained are being rapidly rotated, together with shaft E and head b, therefore the cutters will cut a circular groove through the board, leaving the center round and tapering, according to the converging angle of the cutters, and which is then finished for use as a bung.

NVheu the cutters have passed through the wood, they arc .withdrawnby the reverse action of the lever on, when the treadle w is released and the spring y throws back the stud 1, releasing the cut bung, when the strip is again placed in position and the operation repeated.

It will be apparent that, by releasing set-nuts d, which locks the T pieces c, and actuating the'screwrods c, the cutters j' may be moved to any desired distance apart and exactly equidistant from shaft E, so as to cut any desired size of bung, and that, as the sliding pieces T are fitted square in the slots in head b, as before explained, that the angles of cutters ff, relatively to shaft E, are always, alike, while by the use of T pieces of varying ngles,ibungs of any desired angle may be cut with this machine.

By uniting the cutters f f with the rods h la, in the manner shown, as the cutters are worn by use they may be extended gradually, so that their points shall remain at the saine distance from the ange j. The points of the cutters are formed iu the usual manner, the one slightly longer being in the V-forutforeutting the sides of the groove, while the other acts asa plow to remove the wood. n

Having thus described my invention,

WVhat I claim as new, and desire to secure by Letters Patent, is

1. The holding-device, consisting of the independent spurred stud q, held in revolving shaft E, stud r, reciprocating head s, lever I, connecting-rod 1:,tr'eadle lw, spring 1 or their equivalent actuating devices, when arranged substantially as described and show n.

2. The cutters f f, iu combination with rods h h Witnesses:

T. W. PORTER, E. F; HALL 

